Factorise range

Hello,

the new design to use range for instruments is very nice.
However, I came across something. I usely use piano staves for vibraphone (as they use 4 mallets), and I've to do the range manually. (maybe one can be added: vib. two staves)

Yet, there are 2 displays:, one for min and one for max, for each (professionnal and non). It'd be more pratictal just have one where you can choose both min and max in a same display (like calendars for travel).